Mechanical stoker.



PATENTED OCT. 9, 1906.

S. W. SIMONDS. MECHANICAL STOKER.

APPLICATION FILED MAR.20,1905.

4 SHEETSSHEET 1.

PATENTBD OCT. 9, 1906.

S. W. SIMONDS.

MECHANICAL STOKER.

APPLICATION FILED MAR.20,1905.

4 SHEETS-SHEET 2 PATENTED OCT. 9, 1906.

S. W. SIMONDS. MECHANICAL STOKER.

ARPLIOATION FILED MAR.ZG,1905.

4 SHEETS-SHEET 4.

SAM W...SIMONDS,

or s'o ERviLLE, MASSACHUSETTS.

MECHANICAL S'TOKER.

Specification-of Letters Patent.

Patented Oct. 9, 1906.

f A pHcatioii'fllodlarch 20.1605. Serial No. 250,899.

To all whom; it may concern.-

"Be it known that I, SAM W. S1MoNns, o

Somerville, in th State of Massachusetts, have invented cerrovements in 'Methe following is a 5 tam new and useful Im chanical- Stokers, of who specification.

his mvention relates to mechanical stokers an 'mchned of' the type .111 which employed alo which the fuel progress sum it higher to the t e ate.

e invention has for its object to' increaseby such anenable the bars or a por-- mtermittently withdrawn from contact with burning fuel, and thus revent ra id deterioe action 0 heat. for its object to rovemen'ts', all as hereinafter described and c aimed. drawings, forming a part of this specification, F e l-represents- I f furnace pro- .fu

the durability of-th arrangement as will tion ofthem to be e grate-bars I 5 cooled sufliciently'to ration of the bars b t The. invention a sohas provide certain incidental t e accompan -a vertical sectional View 0 v1ded 1W1 my invention, the lines w s own in elevation.

'tion on'line 2 2 of Fig. '1, showing the adja- V nace-box construc- 3 represents anenlargement of a e grate-bars in Fig. 4 represents a vererent embodiment which would indicate t e supporting connections of some of confusion.

elevation of the ap- Fig. 6 represents on of the apparacent parts of a double tion. Fig. portion of Fig. 1, showing th different positions. tical section showing a diii of my invention, the lines 0 th belng omitted to avoid Fig. 5 represents a front paratus shown in Fig. an end elevation of a tus shown in Figs. tan

same parts in all the Referring to Figs. resent two series of horizontal gures.

go tiall The said 18 caused to lower endof th th a mechanical stoker embodyi hich would e same reference characters indicate the 1, 2, and 3, a and a repgratebars, the top. and bottom" sides of which are substaned to similar inclined supports or beams supports 6 and b are movable y antifriction rollers or balls-c, restin ed orizontal tracks or guides d. anism is employed for moving the supports 6 and 6 simultaneously in op o'site directions, hen the supports and the bars a thereon are moving in one direction the supports 6 and the bars a are moving in the opposite direction. Each series of bars is thereore alternately projected and retracted, so at their outer edges are alternately exposed to contact with the burning fuel and withdrawn from such contact. While'the bars are 'out of contact with the fuel their term perature is suificientlydecreased to prevent undue deterioration or burning out' of their acting portion. The described motion of the fuel to travel progressively The bars are moved at a relatively slow. rate by suitable mechanism, h as" here shown, includes a horizontal shaft d, to which a slow rotary movement is im arted, cams e bo i grate is e, formed in disk shaft (1, f and f, having trundleerolls en gaged with the cams e e, and rods h h, conmeeting the levers ff with the supports b b. The described mechanism is organized to move the supports 5 6 simultaneously in opposite directions, so that each series of grate-bars is alternately projected beyond e intermediate bars.

indicate and retracted from th e bars are in such close proximity'to each other thatthere are no openin s of sufiicient widt to permit lumps of fue to lodge be tween the bars. The crevices between ,the

sufficient represents a coal to the upper end j represent feeding and reducing rolls-adapted to insure a uniform delivery of fuel from thehopper to the upper end of the grate and duce any lumps which are too large, the

' suitable means, in-

two rolls, tion in opposite directions. k k represent cinder crushing and removing rolls located at the lower end of the grate, these rolls being provided with crushing teeth or projections and rocked in their bearings by lin neoting an arm on one of the rolls arm on one of the grate-bar supports, the

horizontally, each support being supported 7 two rolls being gearedtogether or otherwise i claim- ,Fconnected so that the rocking motion imparted to one is transmitted to the other.

of substantially horizontal .bars arrangedto n represents a brick arch located over the upform aninclined series of steps, andmeans 5 per portion of the grate, and represents a arch, said wall the other side purposes. of a brick arch vertical wall at one end of the formin one side of a throat of whic is formed by the en for withdrawing a portion of said steps out of contact with the fuelat intervals for cooling 2. An inclined grate comprising two series at one end of the fire'box. Air is admitted of substantially horizontal bars arranged to to under the arch a through one or more conform an inclined series of steps, and means duits r to insure combustion of the smoke for changing the relative. positions .of the and gases under the arch, the

through the throat 1).

In Fi 4 I show an inclined grate comof substantially horizontal forming an inclined series of steps.

3. An inclined grate compfising two series ars arranged to the whole for reciprocating the two series of bars simultaneouslyv n op osite directions to"move bars a are reciprocated horizontally, 'the them alternately into and out of contact with eing, horizontally movable,

supthe-fuel. v v or 4. An in lined grate comprising two series of of substantially horizontal bars arrangedto so that their form an inclined series of steps, inclined supforward edges are continuously in contact ports for said bars, substantially horizontal z 5 with the burning fuel. The movable bars a. tracks or guides for said supports, and means are alternately projected'and retrac that they are intermittently coo d The mechanism for reciproc ports]; and bars (1 (shown in 6) comprises a shaft "s, journaled'i bearings, eccentrics s, affixed to sai and engaging yokes s affixed to the suports b. The shaft s and its eccentrics are rotated step by step by the following means: 11 fixed bearft '11.. To the the strap of 5. t represents a shaft journaled i ings and geared to a'driving-sha shaft't-is aflixed an eccentric t which is connected by a rod t with a slotted arm 5, adapted to oscillate on the shaft 8. 4oThe arm t carries a pawl t, which ratchet t affixed to the shaft 5 t and pawl t causing a step-by tion of the shaft 5 and eccentri reciprocating the supports 1) .sented at 00.

It will be seen that in each of the abovemy invention grate-bars, the outer edges of which are intermittently pro-. tected by being retracted behind another series of grate-bars. In the described embodiments of there is an inclined series of bars is intermittently protected by while in the construction shown in only one series of bars is thus protected.

Figs. 4, 5, and

fixe d shaft (1 step by affixed to its (1 ratchet and and a link construction grate-bars alternately into and out 0 conting the suptact with the fuel 4 5; An inclined grate comprising two series of substantially horizontal bars, inclined supsteps, the bars of one series alternating wit those of the other series, horizontal tracks or lidBS for said supports, arotarydriving, shaft, and connections-between said shaft and the grate-bar supports, for moving said opposite .directions to bring said grate-bars fuel.

6. An inclined grate comprising two series ofsubstantially horizontal bars arranged to form an inclined series of steps, a fuel-hopper above the grate, a feeding device in said hopper, operating means for moving said-bars into and out of contact with the fuel, and connections between the feeding device and said operating means.

7. An inclined grate comprising two series of substantially horizontal bars arranged to means forv moving said bars into. and out of contact with the fuel, clearing means at the lower end of the grate, and operative con-- nections between the clearing-means an the bar-operating means. I

8. In a grate, the combination of two sets of grate-bars, each set adapted tosu port substantially the entirefuel-bed out 0 contact with the other set, and'means for causl f grate-bars, each set adapted to support 1. Aninclined grate comprising two series alternately into and out of contact with the form an inclined series of' steps, operating products of bars to bring them alternate y into. and out combustion from the entire fire-box passing of contact w' h'the fuell Y '80 posed 0 two series of bars a? 0, the bars a form an inclinedseries of steps, and means alternating with the bars a and ted, so for reciprocating the supports to brin said supports and grate-bars simultaneously in I IIC ing said sets to support said fuel-bed alter- Q shown 'in Figs. 1 and 3 each series of gratenately, whereby the set not in contact withthe other, the fuel-bed is permitted to cool.

Fig. 4- 9.111 a grate, the combination of We sets ports holding said bars in inclined seriesof arranged alternately'with respect to the bars 1 of the other set, and means for causing said 5 sets to shpport said fuel-bed 'alternately,i Witnesses:

substantially the entire fuel-hed out of con In testimeny wheredf I heive affixed my tact with the 0ther set,.,the bars pf one set signature in presence of tWo Witnesses."

SAM SIMONDS= whereby the set not in contact with the fuel- DENNIS COUGHLIN, bed is permitted to cool. 4 CHARLES H. H RR M N 

